Sen. Bill Nelson, D-Fla., speaks during a roundtable discussion with education leaders from South Florida at the United Teachers of Dade headquarters, Aug. 6, 2018, in Miami. (AP)

Florida U.S. Sen. Bill Nelson recently warned that Russian hackers have breached Florida’s voting systems. But he offered little evidence to back up his point.

In a series of events and interviews in the first half of August, Nelson said that Russians are in Florida’s election records ahead of the Aug. 28 primary and Nov. 6 general election.

Nelson made his comments in the midst of a tough re-election battle against Republican Gov. Rick Scott. But Nelson has provided no evidence for his statements, saying that the information is "classified" and pointing to one TV report based on anonymous sources. State and federal officials, as well as multiple county election officials, have said they have no evidence that Russians are in Florida’s election records.

We are not putting Nelson’s statements on the Truth-O-Meter at this time because the facts are in dispute, and we can’t independently evaluate classified information. But here’s what you should know about Nelson’s claims.

Nelson was asked about his comments the next day at a campaign event in Tampa. Nelson said of the Russians that "they have already penetrated certain counties in the state, and they now have free rein to move about." Nelson said that he was referring to hacking right now and not the 2016 election.

Nelson told reporters that along with Rubio he wrote a letter warning Florida election officials about hacking.

"Two senators — bipartisan — reached out to the election apparatus of Florida to let them know that the Russians are in the records, and all they have to do, if those election records are not protected, is to go in and start eliminating registered voters."

But that July 2 letter didn’t state unequivocally that Russians are in Florida records right now. The letter stated that "Russian government actors targeted our election infrastructure during the 2016 elections." The letter also says that the Senate Select Committee on Intelligence found that "it is possible that additional activity occurred and has not yet been uncovered."

Nelson’s office did not answer our questions for this article, instead sending us an Aug. 17 NBC report to bolster its position. NBC wrote that three people familiar with the intelligence had told the network that there is a classified basis for Nelson's assertion. NBC didn’t name its sources.

The sources said the intelligence had been described to Nelson by two senators: Republican Richard Burr, the chairman of the Senate Intelligence Committee, and Mark Warner, the top-ranking Democrat.

"The sources say Nelson was not supposed to speak publicly about the matter, and he erred by suggesting that the information was new," NBC reported.

Burr’s office did not respond to an inquiry from PolitiFact. In an interview, Warner’s office declined to directly address the accuracy of Nelson’s assertion but said in a statement that Nelson and Rubio "are right to warn their state’s election officials about this very serious and ongoing threat to our democracy."

A spokeswoman for Rubio did not cite any specific evidence that Florida election information had been hacked.

What state and federal officials have said

Florida’s top elections official, Ken Detzner, has repeatedly said he has seen no evidence of hacking in the state’s systems. He has asked Nelson to provide more information but has not received a response. Detzner is a political appointee of Scott.

Detzner’s office has also reached out to the federal Department of Homeland Security, the FBI and the Florida Department of Law Enforcement about Nelson’s allegations, saying none had information to corroborate Nelson’s statements.

On Aug. 21, DHS Secretary Kirstjen Nielsen and FBI Director Christopher Wray wrote a letter to Detzner stating that they "have not seen new or ongoing compromises of state or local election infrastructure in Florida." However, they said that Russia has previously shown the "intent and capability to conduct malicious cyber operations." This echoes a statement earlier in August from DHS.

Nelson’s spokesman Ryan Brown didn’t respond to questions from PolitiFact about that statement, which seems to contradict Nelson.

In a statement to the media, Brown said the letter did not contradict Nelson: "In my opinion, there's nothing in this letter that contradicts what Sen. Nelson said he was told a few months ago, and what he and Sen. (Marco) Rubio have tried to warn about in order to guard against Russian meddling in our elections. The governor of Florida has a security clearance and could have quickly and directly received information, answers and posed any questions instead of engaging in these confusing and partisan histrionics of the past week."

When Nelson was asked about an earlier statement by DHS pouring cold water on his allegations, he replied: "Well, they're not going to know. They don't have the records. The records are retained by the local county supervisor of elections. So that's why the intelligence leadership asked us to reach out to them, to say reach out to the FBI or DHS to come in and check the security of your system."

Asked if he believed that Russians had already penetrated Florida voter rolls, Nelson said: "I think it is very clear that the Russians were in Florida in 2016, that they are continuing."

Lux said that all the counties have signed up for alerts from the Center for Internet Security that would alert them to such issues, and that many counties were visited by the FBI and state officials to check out their facilities.

Election officials in Miami-Dade, Broward, Hillsborough, Pasco, Pinellas and Orange counties all also told PolitiFact that they had seen no signs of election hacking.

More than 1 million voters have cast ballots by mail or early voting ahead of Florida’s Aug. 28 primaries.

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